How does the "Preview" tool work?

[mcastillo356]

Hi PF

First I must apologize for posting a trivial question; I did it when published "Advice to obtain the domain of compound functions": the answer was given at the same time. I also typed bad, I forgot one delimiter.
How works Preview tool? How can I make use of it to obtain a preview as many times as I need? I didn't manage to display it more that one time.

Regards!

 

[hutchphd]

You should be able to toggle preview mode using the icon (button). Sometimes it is a little funky. Notice the other buttons change to red in preview mode

 

[mfb]

Just press the preview icon again to continue editing. Unfortunately it's currently not possible to have editing and preview at the same time.